The 4 rules (many are doing it wrong) - https://www.youtube.com/watch?v=W2Vrc2R1oGU&t=1sshooting a pistol -
Pistol Grip -
Dry practice - https://www.youtube.com/watch?v=lYJk_ioERK8&t=1204s
FREE Fighting Pistol Training - https://www.full30.com/watch/MDIzNzA1/fighting-pistol
TrexArms Training - https://www.youtube.com/playlist?list=PLjz1xuO0O0cOfQFCJ0Rizr51EqjSECtjT
This has many vids in the playlist, but some that are gold. Instead of posting a long list, I figured it better to just post the playlist. This also has how to manage rifle recoil.
Body Transitions - https://www.youtube.com/watch?v=3BCPJwT40_s&t=603s
Most of this is for the individual, and I dabble in some basic group movement at the end. Fundamentals must be learned.